<template>
  <div class="el-input_ico login-container">
    <div class="login-box">
      <div class="avatar_box">
        <img src="../assets/logo.png" />
      </div>
      <el-form :model="loginFrom" ref="loginFromRef" :rules="loginFromRules" class="login_form">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginFrom.username" prefix-icon="iconfont icon-user el-input_ico"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginFrom.password"
            prefix-icon="iconfont icon-3702mima el-input_ico"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 登录 重置按钮 -->
        <el-form-item class="btns">
          <el-button @click="login('loginFromRef')" type="primary">登录</el-button>
          <el-button @click="resetForm('loginFromRef')" type="info">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Login',
  // 表单数据绑定
  data() {
    return {
      loginFrom: {
        username: 'admin',
        password: '123456'
      },
      // 表单验证规则
      loginFromRules: {
        // 验证用户名
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
        ],
        // 验证密码
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 重置表单,恢复到初始值
    resetForm(formName) {
      this.$refs[formName].resetFields()
    },
    // 验证表单
    login(formName) {
      this.$refs[formName].validate(async valid => {
        // 验证用户名和密码是否符合
        if (!valid) return
        // 发送axios请求
        const { data: res } = await this.$http.post('/login', this.loginFrom)
        // 判断返回数据的状态,是否登录成功
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        // 提示框,提示登录状态
        this.$message.success(res.meta.msg)
        // 保存token到本地,sessionStorage只在登录期间有效,当浏览器关闭时保存的token失效
        window.sessionStorage.setItem('token', res.data.token)
        // 跳转到主页面
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login-container {
  height: 100%;
  background-color: #2b4b6b;
}
.login-box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  width: 130px;
  height: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  text-align: center;
}
/deep/ .el-input_ico {
  margin-left: 10px;
}
</style>
